CN107819561A - For the apparatus and method and computer-readable storage medium in radio communications system - Google Patents

For the apparatus and method and computer-readable storage medium in radio communications system Download PDF

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Publication number
CN107819561A
CN107819561A CN201710874282.1A CN201710874282A CN107819561A CN 107819561 A CN107819561 A CN 107819561A CN 201710874282 A CN201710874282 A CN 201710874282A CN 107819561 A CN107819561 A CN 107819561A
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China
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equipment
channel resource
communications system
radio communications
signal
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CN201710874282.1A
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CN107819561B (en
Inventor
饶毓
陈巍
曹志刚
郭欣
泽井亮
木村亮太
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Tsinghua University
Sony Corp
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Tsinghua University
Sony Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0012—Modulated-carrier systems arrangements for identifying the type of modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio

Abstract

Present disclose provides for the apparatus and method and computer-readable storage medium in radio communications system.A kind of equipment being used in the first radio communications system includes memory and processor, wherein, memory storage computer instruction.Processor is configured as performing the computer instruction that is stored in memory to perform：Receive the signal of communication between each equipment in the second radio communications system；One or more features for the difference that can reflect between the first transmission means of the second radio communications system and the second transmission means are extracted from signal of communication；And judge that the channel resource that signal of communication takes is used for the first transmission means or the second transmission means according to feature.Wherein, the equipment in the first radio communications system accesses the frequency spectrum for not possessing mandate based on judged result opportunistic, and the channel resource that signal of communication takes is located at the frequency spectrum that equipment does not possess mandate.

Description

For the apparatus and method and computer-readable storage medium in radio communications system
The application is the applying date on October 14th, 2011, Application No. " 201110323808.X ", entitled " recognized Know radio communications system and for apparatus and method therein " application for a patent for invention divisional application.
Technical field
This disclosure relates to the communications field, in particular it relates to cognitive radio communication systems and for equipment therein and side Method.
Background technology
Under cognitive radio (Cognitive Radio, CR) scene, in order that not possessing the secondary system for authorizing frequency spectrum System (Secondary System, SS) can access to chance (the Primary System, PS) of main system mandate frequency spectrum, need Will the subsystem possess find frequency spectrum service condition ability.User in subsystem (is referred to as secondary user's (Secondary User, SU)) frequency spectrum that main system is used is perceived, judge whether primary user (Primary User, PU) (user i.e. in main system) signal, and on the basis of avoiding interfering PU, how decision uses principal series The frequency spectrum of system.
The content of the invention
The inventor of the disclosure has found that under cognitive radio scene, subsystem needs to know the letter of main system first The uplink-downlink configuration situation (i.e. each channel resource be used for up or descending) of road resource, as follow-up frequency spectrum perception and Disturb the basis of control.For example, using main system as the communication system (such as time division duplex (TDD) communication system) based on time division transmission Exemplified by, the transmission of down channel resources thereon in time scale alternately.Wherein, the minimum duration of downstream transmission Commonly referred to as subframe (Subframe).That is, under CR scenes, secondary user's need to know the up-downgoing class of each subframe Type.In addition, in a tdd system, several ascending-descending subframes are combined into a frame (Frame), and the ascending-descending subframes in every frame Combination be referred to as uplink downlink configuration (downlink-uplink configuration).In general, uplink downlink is matched somebody with somebody Polytype can be had by putting and (being referred to as " frame configuration "), and the configuration of these types is discussed in detail in the communication standard of correlation.
In the prior art, subsystem is usually assumed that it has been found that the uplink-downlink configuration of the channel resource of main system.Example Such as, usually assume that subsystem is believed by carrying out information exchange with main system to obtain the channel resource uplink-downlink configuration of main system Breath.And this its system immutable with main system under CR scenes is set and subsystem is transparent requirement for main system It is not inconsistent.In addition, in the case where main system actively can transmit its channel resource configuration information to subsystem, can also there is master System deliberately transmits error message, to prevent subsystem from using the selfish behavior of its frequency spectrum.
Some embodiments of the present disclosure provide the apparatus and method for cognitive radio system (i.e. subsystem), profit With this equipment or method, subsystem can obtain the channel of main system in the case where not carrying out information exchange with main system The uplink-downlink configuration information of resource, so as to ensure the correctness of information that subsystem obtained.
The brief overview on the disclosure is given below, so as to provide on the disclosure it is some in terms of basic reason Solution.It should be appreciated that this general introduction is not the exhaustive general introduction on the disclosure.It is not intended to determine the key of the disclosure Or pith, nor intended limitation the scope of the present disclosure.Its purpose only provides some concepts in simplified form, with This is as the preamble in greater detail discussed later.
According to an aspect of this disclosure, there is provided a kind of equipment being used in cognitive radio communication systems.The equipment It may include：Reception device, for receiving the signal of communication in another radio communications system between each equipment；Feature extraction fills Put, can reflect between the downstream transmission mode of another radio communications system for being extracted from the signal of communication Difference one or more features；And up-downgoing judgment means, for judging the communication letter according to the feature Number take channel resource be used for uplink or downlink transfer.
According to another aspect of the present disclosure, there is provided a kind of cognitive radio system, the system may include the said equipment.On State in the user equipment that equipment can be configured in the cognitive radio system, or be configured in the cognitive radio system Base station in.
According to another aspect of the present disclosure, there is provided a kind of method being used in cognitive radio communication systems.This method It may include：Receive the signal of communication between each equipment in another radio communications system；Extraction can from the signal of communication One or more features of the difference reflected between the downstream transmission mode of another radio communications system；And root Judge that the channel resource that the signal of communication takes is used for uplink or downlink transfer according to the feature.
In addition, embodiment of the disclosure additionally provides the computer program for realizing the above method.
In addition, embodiment of the disclosure additionally provides the computer program product of at least computer-readable medium form, its Upper record has the computer program code for realizing the above method.
According to one embodiment, a kind of equipment being used in the first radio communications system includes memory and processor, Wherein, the memory storage computer instruction.The processor is configured as performing the meter being stored in the memory Calculation machine is instructed to perform：Receive the signal of communication between each equipment in the second radio communications system；From the signal of communication The one of the difference that extraction can reflect between the first transmission means and the second transmission means of second radio communications system Individual or more feature；And judge that the channel resource that the signal of communication takes is used for the first transmission side according to the feature Formula or the second transmission means.Wherein, the equipment in first radio communications system connects with being based on judged result opportunistic Enter not possess the frequency spectrum of mandate, the channel resource that the signal of communication takes is located at the frequency spectrum that the equipment does not possess mandate.
According to one embodiment, a kind of method being used in the first radio communications system includes：Receive the second radio Signal of communication in communication system between each equipment；Extraction can reflect second radio communication from the signal of communication One or more features of difference between the first transmission means and the second transmission means of system；And according to the feature To judge that the channel resource that the signal of communication takes is used for the first transmission means or the second transmission means.Wherein, described Equipment in one radio communications system accesses the frequency spectrum for not possessing mandate, the signal of communication based on judged result opportunistic The channel resource of occupancy is located at the frequency spectrum that the equipment does not possess mandate.
According to one embodiment, there is provided a kind of computer-readable storage medium, record has computer-readable computer thereon Program code, the computer program code is when being read by computer and being performed so that the computer performs above-mentioned be used for Method in first radio communications system.
According to one embodiment, a kind of equipment being used in radio communications system includes memory and processor, wherein, The memory storage computer instruction.The processor is configured as the computer that execution is stored in the memory and referred to Make to perform：The signal energy value on multiple channel resources is estimated according to energy measuring method；Based on estimated energy value with Relation between predetermined threshold determines the seizure condition of each channel resource；Estimated according to the seizure condition of the multiple channel resource Count the occupancy pattern of the plurality of channel resource；And the multiple channel money is accessed based on estimated occupancy pattern opportunistic Frequency spectrum corresponding to source.Wherein, the frequency spectrum can be simultaneously shared by other equipment, and the equipment is avoiding setting described other It is standby interfere on the basis of access the frequency spectrum.
According to one embodiment, a kind of method being used in radio communications system includes：Estimated according to energy measuring method Count the signal energy value on multiple channel resources；Each letter is determined based on the relation between estimated energy value and predetermined threshold The seizure condition of road resource；The occupancy pattern of the plurality of channel resource is estimated according to the seizure condition of the multiple channel resource； And frequency spectrum corresponding to the multiple channel resource is accessed based on estimated occupancy pattern opportunistic.Wherein, the frequency spectrum Can be simultaneously shared by other equipment, described in the equipment accesses on the basis of avoiding interfering the other equipment Frequency spectrum.
According to one embodiment, a kind of equipment being used in radio communications system includes memory and processor, wherein, The memory storage computer instruction.The processor is configured as the computer that execution is stored in the memory and referred to Make to perform：Detect the energy value on channel resource；Based on the energy value and the relation of predetermined threshold detected with certain general Rate judges the seizure condition of the channel resource；And it will determine that result is sent to a fusion device to melt with the energy value detected Close the judged result in the multiple equipment of different spaces distribution.Wherein, the equipment accesses not with being based on judged result opportunistic Possess the frequency spectrum of mandate, the channel resource is located at the frequency spectrum that the equipment does not possess mandate.
According to one embodiment, a kind of method being used in radio communications system includes：Detect the energy on channel resource Value；Based on the energy value and the relation of predetermined threshold detected with the seizure condition of certain probabilistic determination channel resource； And it will determine that result is sent to a fusion device to merge the multiple equipment in different spaces distribution with the energy value detected Judged result.Wherein, the equipment accesses the frequency spectrum for not possessing mandate, the channel resource based on judged result opportunistic The frequency spectrum of mandate is not possessed positioned at the equipment.
According to one embodiment, there is provided a kind of computer-readable storage medium, record has computer-readable computer thereon Program code, the computer program code is when being read by computer and being performed so that the computer performs above-mentioned be used for Method in radio communications system.
Brief description of the drawings
With reference to the explanation of the embodiment of the present disclosure, can be more readily understood that below in conjunction with the accompanying drawings the disclosure more than and its Its objects, features and advantages.Part in accompanying drawing is intended merely to show the principle of the disclosure.In the accompanying drawings, identical or similar Technical characteristic or part will be represented using same or similar reference.
Fig. 1 is the schematic stream for the method being used in cognitive radio system for showing one embodiment according to the disclosure Cheng Tu；
Fig. 2 is the indicative flowchart for showing the method being used in cognitive radio system according to a specific embodiment；
Fig. 3 is the schematic diagram for showing the applicable application scenarios of the disclosure；
Fig. 4 is the indicative flowchart for showing the method being used in cognitive radio system according to another embodiment；
Fig. 5 is to show the table that the frame used in TD-LTE standards configures；
Fig. 6 is the indicative flowchart for showing to calculate an example of the method for matching distance；
Fig. 7 is the signal for the method being used in cognitive radio system for showing the another specific embodiment according to the disclosure Property flow chart；
Fig. 8 is the signal for the method being used in cognitive radio system for showing the another specific embodiment according to the disclosure Property flow chart；
Fig. 9 (A), 9 (B), 9 (C) are respectively illustrated using the multiple equipment in cognitive radio system to detect another nothing The model of the uplink-downlink configuration of the channel resource of line electric system；
Figure 10 is the schematic block diagram for the structure for showing the equipment being used in cognitive radio system according to an embodiment；
Figure 11 is the schematic frame for the structure for showing the equipment being used in cognitive radio system according to another embodiment Figure；And
Figure 12 is the block diagram for the structure for showing the computer for realizing embodiment of the disclosure or example.
Embodiment
Illustrate embodiment of the disclosure with reference to the accompanying drawings.Retouched in an accompanying drawing of the disclosure or a kind of embodiment The element and feature that the element and feature stated can be shown in one or more other accompanying drawings or embodiment are combined.Should Work as attention, for purposes of clarity, eliminated in accompanying drawing and explanation known to, those of ordinary skill in the art unrelated with the disclosure Part and processing expression and description.
Embodiment of the disclosure provides the apparatus and method for cognitive radio system (also referred to as subsystem), makes The channel of the main system can be obtained in the case where not carrying out information exchange with another radio communications system by obtaining subsystem The uplink-downlink configuration information of resource.In the disclosure, described another radio communications system is referred to as main system, and it can To be any communication system that can be applied to cognitive radio scene, for example, the radio communications system based on time division transmission (such as tdd communication system) etc., is not enumerated here.
Fig. 1 is the indicative flowchart for showing the method for cognitive radio system according to the embodiment of the disclosure one. In the method, the equipment in subsystem judges that the channel of main system provides according to the transmission feature of the signal of communication of main system The uplink-downlink configuration in source.
As shown in figure 1, this method can include step 102,104 and 106.
In a step 102, the equipment in subsystem receives the signal of communication between each equipment in main system.It is described here Subsystem in equipment can be user equipment (also referred to as secondary user's) or subsystem in subsystem In base station equipment.
At step 104, the equipment in subsystem extracts one or more features from the signal of communication received. The feature extracted can be the downstream transmission mode that can reflect main system in the uplink and downlink communication signal of main system it Between difference any feature.So, in step 106, the equipment of subsystem can judge according to the feature extracted Channel resource shared by the signal of communication of its main system received is used for uplink or downlink transfer.In other words, it is secondary The signal of communication that the equipment of level system passes through the received main system of analysis, you can learn the up-downgoing of the channel resource of main system Configuration.
The inventor of the disclosure has found, in different communication systems, it is relatively more aobvious that uplink and downlink communication signal can have some The difference of work.For example, transmission power is different used by uplink and downlink signals.Generally, the transmission power of downstream signal can be significantly big In the transmission power of upward signal.In this case, the equipment of subsystem can be extracted from the signal of communication of main system The feature of its transmission power can be reflected, so as to judge the channel resource shared by the signal of communication be for uplink or Downlink transfer.The equipment of subsystem can be extracted using any appropriate method from signal of communication reflects its transmission power Feature, it is for instance possible to use the energy measuring method described hereinafter with reference to Fig. 2 or formula (1)-(3), is not described herein in detail.
As another example, in some communication systems, modulation system is different used by uplink and downlink signals, therefore, secondary The equipment of level system can extract the feature that can reflect its modulation system from the signal of communication of main system, as the spy Sign.Any appropriate method can be used to extract the feature for reflecting its modulation system from signal of communication, such as can utilized small The extractions such as the Modulation Mode Recognition algorithm of wave conversion reflect the feature of modulation system, are not described herein in detail.
As another example, in some communication systems, the peak-to-average force ratio of uplink and downlink signals is different, in this case, secondary The equipment of level system can calculate the ratio of its peak value and average according to the signal of communication of main system, as the feature, be used for It is to be used for uplink or downlink transfer to judge the channel resource shared by the signal of communication.
In a specific embodiment, the equipment of subsystem can be extracted from the signal of communication of main system reflects its hair Any one in the feature of penetrating power, the feature and the ratio between its peak value and average for reflecting its modulation system, as the feature. As another specific embodiment, the equipment of subsystem can extract two in features described above from the signal of communication of main system Or more, and utilize two or more features extracted judge the channel resource shared by signal of communication be used for Row is still for descending, so that follow-up judged result is more accurate.
In addition, it should be understood that described above be characterized in exemplary, rather than exhaustive.Can use to reflect Any other feature of the difference of the downstream transmission mode of main system, without being confined to feature listed above.
In the method described above with reference to Fig. 1, the signal of communication for the main system that the equipment utilization of subsystem is received To judge the uplink-downlink configuration of the channel resource of main system.In this way, the equipment of subsystem need not and main system Equipment carry out information exchange, therefore, there is no need to main system and change its system configuration, can preferably meet under CR scenes secondary The system requirement transparent to main system.
Some specific embodiments according to the disclosure are described below.
Fig. 2 shows a specific embodiment of the method for cognitive radio system of the disclosure.In the specific implementation In example, the equipment of subsystem can extract the feature for reflecting its transmission power in the signal of communication of main system, for judging The uplink-downlink configuration of the channel resource of main system.
As shown in Fig. 2 in step 202, the equipment in subsystem receives the communication letter between each equipment in main system Number.Then, in step 203, the equipment in subsystem can extract the synchronizing information in received signal of communication, with fixed Each channel resource that the position signal of communication takes.So that main system is based on the communication system of time division transmission as an example, subsystem Equipment can carry out the positioning of subframe head and frame head first after the signal of communication of main system is received.Here, the frame and Subframe is the channel resource, and subframe head and frame head refer to the side between border and frame and frame between subframe and subframe respectively Boundary, and position the border that each channel resource refers to locating frame and subframe.Here, the equipment of subsystem needs to have and main system Relevant communication standards in synchronizing signal and synchronous sequence define relevant priori.These prioris can be advance It is stored in the storage device (not shown) of the equipment of subsystem.Subsystem can utilize the communication standard of main system Defined in synchronizing signal and primary user's signal carry out circulation coherent detection, and combine the synchronous sequence definition in communication standard, To position the initial time of each subframe and frame.It will be understood to those skilled in the art that any appropriate method can be used The circulation coherent detection is carried out, is not described herein in detail.In addition to above-mentioned priori, the equipment of subsystem carries out related inspection Other prior informations are not needed during survey.In general, if the equipment of subsystem carries out subframe and the synchronizing process of frame and only needed A dry radio frames can be completed.The subframe head and frame head position fixing process are similar with the synchronizing process in the initialization of main system, It is not described herein in detail.
Then, in step 204, the equipment of subsystem can estimate letter of the signal of communication of main system shared by it Energy value in road resource, the feature as the uplink-downlink configuration for judging channel resource.Any appropriate side can be used Method estimates the energy value of signal of communication (as using the example described in below with reference to formula (1)-(3)), as reflecting it The feature of transmission power, is not described herein in detail.Afterwards, in step 206, the equipment of subsystem judges estimated energy value Whether meet predetermined relation between predetermined threshold (being referred to as first threshold), if so, under then judging that the channel resource is used for Row transmission, otherwise, then judges that the channel resource is used for uplink.In general, the downlink transfer generally use of main system Constant power, and for uplink, due to PU quantity, allocated sub-carrier number and allocated power etc. no Together, thus uplink transmission power it is of different sizes.But downlink transmission power is always noticeably greater than uplink power.In order to Downlink transmission and up-link transmission are distinguished, to consider maximum extreme case (the i.e. all sub- loads of the transmission power of the latter The allocated situation of ripple), to more accurately distinguish between uplink and downlink transfer.Therefore, the equipment of subsystem can root According to the down transmitting power and its maximum uplink transmission power of main system, the first threshold is set.For example, can take between Between down transmitting power and its maximum uplink transmission power any one numerical value (as the two average or therebetween in Value etc.), as the first threshold.When estimated energy value is more than first threshold, it can be determined that the channel of signal of communication Resource is used for downlink transfer, otherwise, then judges that it is used for uplink.It should be understood that under different application scenarios, main system Down transmitting power and its maximum uplink transmission power can be different, therefore, do not limit the predetermined threshold specifically here Concrete numerical value.In addition, the information such as down transmitting power and its maximum uplink transmission power about main system can be used as priori Knowledge store is in the storage device (not shown) of the equipment of subsystem or storage separates with the equipment of subsystem But can by subsystem equipment access storage device in, be not described herein in detail.
In above-described specific embodiment, the difference of the equipment utilization main system up-downgoing transmission power of subsystem To judge the uplink-downlink configuration of the channel resource of main system.Down transmitting power and its maximum up transmitting work(except main system Outside rate, other prior informations that subsystem need not obtain main system can carry out the judgement of uplink-downlink configuration, be easy to time The deployment of level system.
Alternatively, the equipment of subsystem have estimated the signal of communication of main system in the channel resource shared by it Energy value simultaneously utilizes estimated energy value to judge that the channel resource is used for after uplink, the equipment of subsystem It can also determine whether the uplink channel resources are idle (step as shown in the dotted line frame 208 in Fig. 2).
By taking the application scenarios shown in Fig. 3 as an example, it is assumed that main system is the communication system based on time division transmission.As shown in figure 3, Assuming that 1 main system (PS) and 1 subsystem (SS) in the application scenarios be present.Wherein, PS includes 1 PS base station (Primary Base Station, PBS) and npuIndividual primary user (PU), SS include a SS base stations (Secondary Base Station, SBS) and nsuIndividual secondary user's (SU).SS attempts the channel resource using the PS closer to the distance.It is assumed here that SS In the edge of PS cells, and PU and SU is respectively R in radius of societypsAnd RssPS and SS in random distribution.
It is assumed that main system is the communication system using TD-LTE standards, include 10 subframes, i.e. n per framesf=10.SS Equipment need to complete the detection to the uplink-downlink configurations of 10 subframes in every frame, i.e., in judgment frame each subframe be for Row transmission is still used for downlink transfer.As a specific example, SS equipment can estimate that it connects using energy measuring method The energy value of each subframe received.In this example, it can use and fast Flourier change is carried out to the signal of communication received The method of (FFT) is changed to obtain the sample of each symbol on subcarrier.Assuming that there is nidIndividual SU carries out each subframe simultaneously The detection of uplink-downlink configuration, si[l, k] (1≤i≤nid) it is that i-th of SU (uses suiRepresent) on k-th of subcarrier receiving The sample of l-th of symbol, then can obtain following formula：
In above formula, s(d)[l, k] and s(u)[l, k] represents l-th symbol of the uplink and downlink signals on k-th of subcarrier respectively Transmission sample, ni[l, k] represents suiThe noise sample received,WithUp-downgoing letter is represented respectively Emitter and su corresponding to numberiBetween channel gain.Three kinds of states of the signal shown in formula (1) represent descending biography respectively Defeated (effectively existing all the time on subcarrier each), uplink (uplink sub-carrier is taken by PU), up free time (i.e. son Carrier wave is not taken by PU, only exists ambient noise).
SU can accumulate the preceding n of each subframesThe energy of individual symbol, and its average is calculated, the energy as each subframe Estimate Ti, i.e.,：
In formula (2), NscIt is the number for the subcarrier used during energy measuring.In order to reduce the symbol for detection Number, it can be assumed that its for main system frequency band in all subcarriers quantity.As described above, the downlink transfer of main system all the time with One constant power is transmitted；And for uplink, due to PU quantity, allocated sub-carrier number and allocated The difference of power etc. so that up general power is of different sizes.In order to distinguish downlink transfer and uplink, to consider the latter's The maximum extreme case of transmission power (the allocated situation of i.e. all subcarriers), to more accurately distinguish between uplink with Row transmission.Formula (1) and formula (2) are combined, can obtain following formula：
In formula (3), " downlink " represents downlink transfer (effectively existing all the time on subcarrier each), " uplink " Represent uplink (uplink sub-carrier is taken by PU), " uplink but idle " it is up it is idle (i.e. the subcarrier not by PU takes, and only exists ambient noise).Assuming that these three states are used respectivelyWithTo represent, wherein,With All it is uplink state.
As can be seen from the above equation, these three states can be distinguished according to the size of estimated energy value, so as to judge The uplink-downlink configuration situation of channel resource.Specifically, the down transmitting power between main system and its maximum up hair can be taken The numerical value penetrated between power, as the first threshold for distinguishing uplink and downlink transfer (as above with reference to step 204 institute State).In addition, judge channel resource (such as each subframe) be used for uplink in the case of, can take between main system Uplink transmission power and environmental background noise statistical value (it should be understood by those skilled in the art that can use it is any appropriate Method carrys out statistical environment ambient noise, is not described herein in detail) between any appropriate numerical value, as Second Threshold.Secondary system The equipment of system can determine whether meet predetermined relation between estimated energy value and the Second Threshold, if so, Then judge the channel resource for the free time.For example, if the energy value of estimation is less than or equal to Second Threshold, the up letter is judged Road resource is the free time, otherwise, then judges that the uplink channel resources are busy.
Describe to determine that the first threshold and the specific of Second Threshold are shown still by taking the application scenarios shown in Fig. 3 as an example below Example.
As it appears from the above,State only includes NscMultiple noise signal on individual subcarrier, it is assumed that NdRepresent the noise of PS channels Power spectral density, BsThe bandwidth of each subcarrier is represented, then Varn=NscNdBSFor the noise power on PS channels.Assuming thatTable Show Second Threshold, in order to distinguish in uplink channel resourcesWithState, it can incite somebody to actionIt is set as only relevant with noise Value.It is theoretical according to energy measuring, the threshold value can be arranged to：
In above formula,Represent that detection statistic is more thanProbability, i.e.,State is mistakenly detected intoOr's Probability,Represent anti-Q functions.Probable value can be determined using any appropriate methodFor example, can be by the probability Value is predefined for a less probable value, for example, 10% or some be less than 10% value, be not described herein in detail.
In addition, it is assumed that first threshold is usedTo represent.The first threshold, can be as described above more than Second Threshold Set like that with reference to the regulation about up-downgoing transmission power in the communication standard of main system.As an example,Can be with Less than average downstream signal reception power, and it is more than average uplink signal reception power.As another example,Can foundation Subsystem receiving terminal is set to the intermediate value of the mean receiving power of uplink and downlink signals., can be from mistake as another example The angle of detection probability is set.It is described further below a kind of based on probability of false detectionDetermine method.
As described above, the base station in main system is all the time with constant power PdProgress downlink transfer, and each PU transmitting Power is relevant with its allocated power.Therefore, when all PU carry out uplink with peak power, the up-downgoing of main system Signal of communication is most easily obscured each other.Therefore, first thresholdIt can be set according to maximum up general power and descending general power It is fixed.Assuming thatUp maximum total transmitter power (dBm) is represented, then is hadWherein,Represent PS branch The maximum PU held number,Represent the maximum transmission power of each PU in PS.Because PU and SU are randomly dispersed in one Determine in region, therefore, the average energy value for the uplink and downlink signals that each SU is received is different.It is contemplated that average case is set First threshold, that is, assume that PU and SU is located at PS and SS center respectively, first threshold can be defined as below
In above formula,Represent PS centers to SS centers (i.e. PS edges) path loss,Represent reference generalStatus error is detected asShape probability of state, pay attention to the probable valueIt is not actual probabilities, but a reference value.Can To determine probable value using any appropriate methodFor example, the probable value can be predefined for a less probable value, than As 10% or some be less than 10% value, be not described herein in detail.Can using following formula come determine byStatus error detection intoShape probability of state
Wherein, λd-uSignal to noise ratio of the downstream signal to upward signal is represented, i.e.,
Fig. 4 shows the another specific embodiment of the method for cognitive radio system of the disclosure.In the specific reality Apply in example, the equipment in subsystem is judging that each channel resource shared by the signal of communication of main system is to be used for up go back After being descending, the judged result can also be carried out using the priori of the standard configuration of the channel resource about main system Further optimization.
The standard configuration of the channel resource of main system described here refers to the channel defined in the communication standard of main system The uplink-downlink configuration type of resource.Priori about the standard configuration can be the equipment for being stored in advance in subsystem In (such as be stored in the storage device (not shown) of equipment), it is not described herein in detail.
As shown in figure 4, this method is similar to the method shown in Fig. 1, step 402,404 and 406 can be included.Step 402, 404 and 406 respectively to the step 102 shown in Fig. 1,104, it is 106 similar, be not repeated herein.In addition, after step 406, should Method also includes step 410.Specifically, in step 410, by the judged result and the channel resource of main system in step 406 One or more standard configurations match, to determine the uplink-downlink configuration type of the channel resource of main system.
As an example, Fig. 5 shows 7 kinds of forms of the uplink/downlink frames configuration defined in TD-LTE standards.Still with Fig. 3 Exemplified by shown application scenarios, it is assumed that main system uses TD-LTE standards, then it should be used in 7 kinds of frames configuration shown in Fig. 5 It is a kind of.As shown in figure 5, TD-LTE standards configure (being represented with digital 0-6) using 7 kinds of frames.Each frame (uses number including 10 subframes Word 0-9 is represented).Wherein, D represents descending sub frame, and U represents sub-frame of uplink, and S represents special subframe.When the equipment of subsystem exists After the uplink-downlink configuration that each subframe is judged in step 406, it can will determine that result matches with these standard configurations, with Further determine that the form of the uplink/downlink frames configuration of main system.
Fig. 6 is shown according to the standard configuration of channel resource to determine that one of the uplink-downlink configuration type of channel resource is shown Example.As shown in fig. 6, in step 410-1, the equipment of subsystem calculate the judged result that obtains in a step 406 with it is each The matching distance of standard configuration, then, in step 410-2, the equipment of subsystem according to the matching distance being calculated come It is determined that the standard configuration most matched with the judged result.For example, it may be determined that the matching distance between the judged result Minimum standard configuration is the channel resource Configuration Type of the main system.
It should be understood that can using any appropriate method come calculate the matching of the judged result and each standard configuration away from From.Still by taking the application scenarios shown in Fig. 3 as an example, it is assumed that main system is TD-LTE system, using 7 kinds of the TD-LTE shown in Fig. 5 One of standard frame format.Subsystem can according to the signal of communication received come each subframe in judgment frame be it is up or under OK, and with such as two different numerical value the judged result to each subframe is represented.For example, it can represent that subframe is with " 1 " It is descending, and represent that subframe is up with " -1 " (or 0)；Or vice versa.So the equipment of subsystem is to multiple subframes in a frame Judged result can form a multi-C vector.Every kind of standard frame format shown in Fig. 5 can also be used in the same way Multi-C vector represents.For example, D can be represented with 1, U can be represented with -1.In addition, under special subframe " S " is also referred to as Row subframe, because preceding several symbols of special subframe are that descending sub frame is (in this case, each for judging in extraction 3) the symbolic number ns that subframe uses when being up or descending feature is preferably less than.Therefore, it can use and calculate two vectors The distance between method calculate the matching distance between the judged result and each standard configuration.The common skill of this area Art personnel, which are appreciated that, can use any appropriate method (example described in following article with reference to formula (21) or (22) or (26)) To calculate the distance between two vectors, it is not described in detail here.
Using the method described hereinbefore with reference to Fig. 4, the equipment in subsystem can utilize the channel about main system The priori of the standard configuration of resource carries out further to the judged result of the uplink-downlink configuration of the channel resource of main system Optimization, so that result is more accurate.
In a specific embodiment, the equipment of subsystem can utilize the feature extracted from multistage signal of communication come Judge that the channel resource is used for uplink or downlink transfer.In other words, using the method described with reference to figure 1,2 or 4 During detecting the uplink-downlink configuration of main system channel resource, the equipment of subsystem can receive multistage signal of communication (such as In the case that main system is the communication system based on time division transmission, multiframe signal is received), and multistage signal of communication is utilized, repeatedly The processing in step 104-106 or 204-206 (or 204-208) or 404-406 (or 404-410) is performed, can so be reduced Influence of the random error event to matching result in each subframe detection process, so that resulting channel resource is upper and lower Row configuration result is more accurate.
In examples described above and example, main system channel resource is detected using single subsystem equipment Uplink-downlink configuration.The judgement using the uplink-downlink configuration of multiple subsystem equipment progress channel resource is described below and merges more Some embodiments of the judged result of individual equipment.Cooperated by using multiple SU, single SU spatial distribution can be reduced Influence to the precision of SU testing result, so that the uplink-downlink configuration result of resulting channel resource is more accurate.
Fig. 9 (A), 9 (B), 9 (C) respectively illustrate to be matched somebody with somebody using the up-downgoing of multiple subsystem equipment progress channel resource The judgement put simultaneously merges the exemplary model of the judged result of multiple equipment, wherein, by taking the application scenarios shown in Fig. 3 as an example, and Assuming that main system is the communication system based on time division transmission mode.In addition, it is assumed that nidRepresent all SU for participating in detection in SS Quantity, and nsuRepresent the quantity of all SU in SS.Can be by nidIndividual SU is divided into ndGroup, the SU numbers in every group are nco=nid/nd.Inspection Survey process can be carried out by a SU, can also be cooperated by multiple SU, therefore, 1≤nd≤nid≤nsu。
In the model shown in Fig. 9 (A), each SU can use above or hereafter described in embodiment or example Method, according to one of the difference between the downstream transmission mode that can reflect main system extracted from the signal of communication or More features judge that the channel resource that the signal of communication takes is used for uplink or the downlink transfer (frame in figure 901a, wherein,For a vector, wherein including i-th of SU (sui(1≤i≤nid)) to the upper of all subframes of m frames Descending judged result), and by the result of the judgement and one or more standard configuration phases of the channel resource of main system Match somebody with somebody, with the result according to the matching come determine the uplink-downlink configuration type of the channel resource of main system (the frame 902a in figure, its In,Represent i-th of SU (sui(1≤i≤nid)) determination result to m frames).Each SU can utilize M frame data to repeat Said process (processing shown in frame 901a and 901b) M times (in frame 903a " shown in × M "), obtain i-th of SU (sui(1≤i ≤nid)) determination result t to frame Configuration Typei.These SU determination result can be sent at one of SU or be sent to Merged at SBS, to further determine that the frame Configuration Type (the frame 904a in figure) of main system.
In the model shown in Fig. 9 (B), each SU carries out the up-downgoing judgement (frame in figure to all subframes of m frames 901b), then all judged results are sent at one of SU or are sent at SBS and merged, obtain fusion knot Fruit D(m)(frame 902b, D in figure(m)For a vector, wherein including the up-downgoing judged result of all subframes to m frames). Then, one or more standard configurations of the channel resource of the fusion results and main system are matched, with according to the matching Result determine the uplink-downlink configuration type of the channel resource of main system (the frame 903b in figure, such as obtain the frames of m frames and match somebody with somebody Type is put, uses T(m)Represent).Processing M times in frame 901b, 902b and 903b is repeated using M frame data, and by M times As a result merge, to determine the frame Configuration Type (the frame 904b in figure) of main system.
Model shown in Fig. 9 (C) is the combination of the model shown in Fig. 9 (A) and Fig. 9 (B).Wherein, each SU is to m frames Subframe carries out up-downgoing judgement (shown in frame 901c).These SU are divided into multiple groups, and the judged result each organized is sent to therein Partial fusion is carried out at one SU or SBS, to determine whether the uplink-downlink configuration of each subframe of m frames (frame 902c institutes Show).Then, the fusion results of every group of SU judged result and each standard configuration are matched, and obtains each group of matching As a result (frame 903c).Frame 901c, 902c and 903c processing M times are repeated using M frame data, and the result of M times is melted Close, to determine the frame Configuration Type (the frame 904c in figure) of main system.Finally, the multigroup determination result obtained merges again, with The final frame Configuration Type (the frame 905c in figure) for determining main system.
Describe to detect the method for the uplink-downlink configuration of main system channel resource using multiple subsystem equipment below Some specific embodiments.Fig. 9 (A), 9 (B), multiple SU of fusion shown in 9 (C) judged result method may be referred to it is following The specific embodiment of description.
Fig. 7 is shown using multiple subsystem equipment to detect the method for the uplink-downlink configuration of main system channel resource One specific embodiment.
As shown in fig. 7, this method can include step 702,704,706,710 and 712,714.
Step 702,704,706 with step 102 described above, 104,106 (or step 202,204,206 or steps 402nd, 404 it is, 406) similar, wherein, the equipment (being referred to as the first equipment) of subsystem receives logical between each equipment in main system Believe signal, the difference that extraction can reflect between the downstream transmission mode of main system from the signal of communication it is one or more Individual feature, and judge that according to the feature extracted channel resource that the signal of communication takes is used for uplink or descending Transmission, is not detailed herein.
In step 712, one or more other equipments that the first equipment is received in subsystem (are referred to as second Equipment) it is up or descending judged result to the channel resource shared by the signal of communication between each equipment in main system.
It should be understood that each second equipment can be judged in main system between each equipment using step 702-706 method Signal of communication shared by channel resource be up or descending, be not repeated herein.
Then, in step 714, the first equipment is according to the judged result of its own and one or more second equipment Judged result, to judge that the channel resource shared by the signal of communication is used for uplink or downlink transfer.
Below still by taking the application scenarios shown in Fig. 3 as an example, the side of the judged result of multiple subsystem equipment is merged in description The example of method.
Assuming that utilize the n in subsystemidIndividual SU come judge shared by the signal of communication of (detection) main system channel money Source is used for uplink or downlink transfer, and assumes that main system is TD-LTE system, is configured using the standard frame shown in Fig. 5. nidEach SU in individual SU can use method as described herein above, be locally generated the judgement knot to each subframe in a frame Fruit, i.e., each SU judge to obtain each subframe onWithThese three states qualitatively judge result really.nidIt is individual SU judged result can be divided into it is multigroup, wherein every group includes ncoIndividual SU (nid≥nco) judged result, can be first by every group Judged result merged after, then multigroup fusion results are merged.
As a specific example, multiple SU judged result can be sent at one of SU (or it is sent to secondary At the SBS of system), these judged results are merged by the SU (or SBS).
As an example, each SU can be binary to the judged result of each channel resource (such as each subframe) (subframe is used for up or descending), directly multiple SU can be melted to the binary judged result of subframe up-downgoing type Close.
As another example, each SU can be to the judged result of each channel resource (such as each subframe) ternary (With).The example can use the method for two threshold values of utilization above with reference to Fig. 2 descriptions.Below with Fig. 3 institutes The example is described exemplified by the application scenarios shown.Assuming that diRepresent i-th of SU (sui) by its energy estimators T to some subframei With first thresholdAnd Second ThresholdAfter being compared, the obtained judged result to the subframe is (i.e. using ginseng above That examines Fig. 2 descriptions judges the method for the uplink-downlink configuration of channel resource using two threshold values), i.e.,
D in above formulaiIt can be represented with 2 bits.Assuming that to merge ncoIndividual SU judged result, then can be to this nco Individual SU adds up to the judged result of each subframe.Assuming that ni(i=0,1,2) represents this ncoJudgements of the individual SU to some subframe As a result middle diRespectively 0,1,2 number, and this ncoIndividual SU is the n for participating in detectionidN-th group in individual SU, then fusion is (as tired out Meter) this ncoIndividual SU judged result, that is, court verdict Ds of this group of SU obtained to the subframen：
If that is, n for some subframecoJudgement knot of the subframe for 2 (descending) is judged in individual judged result The number of fruit is maximum, then it is descending, i.e. D to adjudicate the subframen=1.If for the n of some subframecoJudge in individual judged result The subframe is maximum for the number of the judged result of 1 or 0 (up), then it is up, i.e. D to adjudicate the subframen=-1.
Above-mentioned judgement can be carried out to each subframe in a frame, to obtain up-downgoing types of the every group of SU to all subframes Court verdict.N-th group SU can use vector to the judged result of all subframes of m framesTo represent, i.e.,Bag Judged results of the SU containing n-th group to all subframes in m frames.
In another example, it is assumed thatRepresent i-th of SUsu in a SUiBy its energy estimators T to some subframeiWith Second ThresholdThe judged result to the subframe obtained afterwards is compared, i.e.,：
Assuming that to merge ncoIndividual SU judged result, then can be to this ncoIndividual SU enters for the judged result of each subframe Row is accumulative, i.e.,：
In above formula, ndeRepresent ncoThe number of primary user's signal is detected in individual SU in some subframe, i.e.,：
In formula (11),Expression determines whether that the subframe is up or descending threshold value (the 3rd threshold value), that is, Say, this ncoIn individual SU, if it exceedsIndividual SU judges there is primary user's signal in the subframe, then it is descending sub frame that can adjudicate it, Otherwise it is sub-frame of uplink to adjudicate it.After it is sub-frame of uplink to adjudicate the subframe, using threshold value(the 4th threshold value) can be further Determine that the sub-frame of uplink still has the subcarrier for being assigned to PU to be all idle.Because the power of downlink transfer is of a relatively high, Therefore, almost each SU may be by Second ThresholdDetect primary user's signal.SoIt can be set as nco, or Person nco-1.AndIt may be referred toSize set.Due toUnder state, it is correctly detectingThe SU of state number Mesh isTherefore can incite somebody to actionIt is arranged to meet following relation：And withKeep Certain gap.It should be understood that one of ordinary skill in the art can be adopted with other appropriate means according to practical application to set The threshold value is put, the disclosure is not limited to above-mentioned example.
The foregoing describe to every group of SU (such as ncoIndividual SU) the hard information decision method that is merged of judged result (use Binary outcome represents court verdicts of the every group of US to subframe) example.Wherein, represent that subframe is up goes back with numerical value 1, -1 It is descending.It should be understood that in actual application, above-mentioned judged result can be represented using any binary numerical value, such as can To use 1 and 0 etc., do not enumerate here.
The example of Soft Inform ation decision method is described below.Soft Inform ation judgement described here refers to：Come without binary numerical value Represent to every group of SU (such as ncoIndividual SU) judged result merged obtained from court verdict, but use a numerical intervals To represent the court verdict.The diverse location in numerical intervals corresponding to each subframe reflects the subframe for upstream or downstream Likelihood probability.Mode is adjudicated using this Soft Inform ation, can further improve the accuracy of judgement.For example, in above-mentioned hard information It is descending to be represented with " 1 " in the example of decision method, it is up to be represented with " -1 ".And in Soft Inform ation decision method, can be by each Numerical intervals that the statistic (such as energy estimators) of subframe and the difference map of threshold value (such as first threshold) arrive (such as [- 1,1] or [0,1] etc.) in.Mapping value of the difference in the numerical intervals is smaller, then it represents that the subframe is bigger for up probability, instead Then represent that the subframe is bigger for descending probability.As another specific example, system that can also be by each SU to each subframe (such as energy estimators) are measured compared with threshold value (such as first threshold), obtain difference, and by ncoThe difference that individual SU is obtained asks flat , the average value obtained can be used as court verdict obtained from merging this group of SU judged result.
If Ti(1≤i≤nco) it is ncoEnergy of i-th of SU to the energy estimators, then these SU of some subframe in individual SU The average of estimateIt is represented by：
By the average respectively with threshold valueWithIt is compared.WhenWhen, adjudicating the subframe isState, Otherwise, willIt is mapped in the scope (other number ranges can also be used) of [- 1,1], the mapping value reflects the son Frame is up or descending probability.Due toTherefore, when being mapped, can set maximum A and Minimum value B, for limiting the difference section that can be mapped.Any appropriate mapping mode can be used, for example with following formula Mapping mode：
In above formula,Expression subframe is up or descending court verdict.As can be seen from the above equation, the foots to be chosen of A Enough big, B then to be chosen sufficiently small, so thatWithIt is sufficiently small, it so can just to reflect Penetrate with reasonability.On the other hand, A can not be too big, and B can not be too small, otherwise can influence the accuracy of mapping.When When, it is believed that corresponding subframe is downstream signal plus noise signal.Due to descending power on each subcarrier mean allocation and For definite value, influenceBe only again noise signal.Therefore, maximum A can be caused to meet following relationship：
α is constant in above formula.Preferably, α=8 can be set so thatIt is sufficiently small.Due to now making an uproar again Sound sample energy is exponential distribution, therefore, as α=8,To be very small.
On the other hand, whenWhen, it is believed that subframe is upward signal plus noise.And due to upward signal power not It is fixed, it is changeable, therefore B value can be determined by the size of noise power.It is therefore possible to use following formula determines B value：
B=β Varn (16)
Work asWhen, it is up that can assert the subframe.β is constant, it is preferable that β also can be taken as 8.CompareAnd B Size, it is seen thatThat is,During state, court verdict is also necessarily mapped as " -1 ".
In the examples described above, above-mentioned judgement can be carried out to each subframe in a frame, to obtain every group of SU to all sons The court verdict of the up-downgoing type of frame.Judged result vectors of the n-th group SU to all subframes of m framesTo represent,Judged result comprising n-th group SU to all subframes in m frames.
After above-mentioned fusion has been carried out, in step 720, by the court verdict and the channel of main system in step 714 One or more standard configurations of resource match, to determine the uplink-downlink configuration type of the channel resource of main system.The step Rapid 710 is similar to step 410 described above, is not repeated herein.
Alternatively, before the determination (step 710) is carried out, the confidence level of each judged result can also be estimated, and Remove the small judged result (step shown in dotted line frame 718 in Fig. 7) of confidence level.
Judged result with the n-th group SU in example above to all subframes in m frames belowExemplified by, to retouch State the example of the method for the confidence level for estimating result.It will again be assumed that main system is TD-LTE system, using 7 kinds shown in Fig. 5 Frame configures.7 kinds of configurations shown in Fig. 5 can be represented with the Matrix C that 7 rows 10 shown in following formula arrange：
In above formula, a kind of frame configuration per a line all shown in representative graph 5, wherein, " 1 " represents descending sub frame, and " -1 " represents Sub-frame of uplink.In addition, as described above, the special subframe " S " shown in Fig. 5 also is indicated as descending sub frame, because special subframe Preceding several symbols for descending sub frame (in this case, extraction be used for judge that each subframe is up or descending spy The symbolic number n used during signsPreferably less than 3).
Understood according to formula (17), the element of the 0-2 row in Matrix C and each column in 5-6 row is mutually the same.Therefore, IfIn 0-2 row and 5-6 row 5 elements in have more than sthIndividual element is with when corresponding element is identical in C, then may be used To judge that to the subframe testing result of m frames be believable.For example, it can be estimated using following formulaConfidence level：
Wherein, s is representedConfidence level.WhenIn this 5 elements and C in corresponding element identical number compared with When more, s values are larger, conversely, then smaller.When having s in this 5 elementsthWhen individual identical, s=1*sth+(-1)*(5-sth)=2sth- 5.Therefore, as s >=2sthWhen -5, it is believed that the judged result is credible, otherwise can abandon the judged result.In this example, examine Consider and there was only 5 fixed subframe types in Matrix C, then sth3 can be taken as.sthAlternatively referred to as the 5th threshold value.It should be understood that can To determine the 5th threshold value s according to practical applicationthValue, and should not serve to be confined to above-mentioned example.
Judged result with the n-th group SU in example above to all subframes in m frames belowExemplified by, to retouch State the example of the method for the confidence level for estimating result.It can be estimated using following formulaConfidence level
Wherein numerical value is bigger represents that subframe is bigger for descending probability, the smaller expression subframe of numerical value It is bigger for up probability,Numerical value it is larger when, explanationIn be used to represent to be ratio to the numerical value of the judged result of subframe Relatively correctly, i.e. judged resultIt is credible.Differ and be set to integer.As an example, can meetWhen, Think the judged resultIt is believable.
Fig. 8 is shown using multiple subsystem equipment to detect the method for the uplink-downlink configuration of main system channel resource Another specific embodiment.
As shown in figure 8, this method can include step 802,804,806,810 and 812,816.
Step 802,804,806 and 810 respectively to step 402 described above, 404,406, it is 410 similar, wherein, it is secondary The equipment (being referred to as the first equipment) of system receives the signal of communication between each equipment in main system, and energy is extracted from the signal of communication One or more features of the difference enough reflected between the downstream transmission mode of main system, sentence according to the feature extracted The channel resource that the disconnected signal of communication takes is used for uplink or downlink transfer, and by the result and principal series of the judgement One or more standard configurations of the channel resource of system match, and the channel of main system is determined with the result according to the matching The uplink-downlink configuration type of resource, is not repeated herein.
In step 812, one or more other equipments that the first equipment is received in subsystem (are referred to as second Equipment) to the determination result of the uplink-downlink configuration type of the channel resource of main system.
Alternatively, the first equipment can also estimate these determinations after the determination result from the second equipment is received As a result and the confidence level of each in the determination result of itself, and the small determination result (void in such as Fig. 8 of confidence level is removed Step shown in wire frame 820).The example that is described hereinbefore with reference to formula (18) or (19) or below with reference to formula can be used (23) or the example of (27) description calculates confidence level, is not repeated herein.
Then, in step 816, the first equipment is merged the determination knot of this equipment and one or more second equipment Fruit, to determine the uplink-downlink configuration type of the channel resource of main system.Specifically, multiple determination results can be merged, estimation is melted Result and the matching distance of every kind of standard configuration are closed, and the upper and lower of the channel resource of main system is determined according to the matching distance Row Configuration Type.
Below still by taking the application scenarios shown in Fig. 3 as an example, the determination result that multiple subsystem equipment are merged in description is come really Determine the example of the method for the uplink-downlink configuration type of the channel resource of main system.It will again be assumed that main system is TD-LTE system, use 7 kinds of frames configuration shown in Fig. 5.In addition, it will again be assumed that utilize the n in subsystemidIndividual SU determines the channel resource of main system Uplink-downlink configuration type.nidThe individual SU judged result to each subframe can be divided into it is multigroup, wherein every group includes ncoIndividual SU (nid≥nco) judged result, first every group of determination result can be merged, obtain including ncoIndividual SU is to all sons in frame The court verdict of frame.It is for instance possible to use merge multiple SU determination knot above with reference to formula (9) or the method for (14) description Fruit, obtain vector(or).Will(or) compared with every kind of frame configuration shown in Fig. 5, and look for A kind of frame configuration minimum to matched distance.
As described above, 7 kinds of configurations shown in Fig. 5 may make up the Matrix C shown in formula (17).
First with vectorExemplified by, describe to determine main system using the determination result of multiple subsystem equipment One specific example of the uplink-downlink configuration type of channel resource.
In one example, in order to calculateWith the matching distance of every kind of frame configuration, can be counted first with following formula CalculateWith the difference of the often row (a kind of corresponding frame configures) in C：
RepresentWith C matrix of differencesI7×1Represent 7 × 1 unit matrix.According to formula (17) (18) understand,In only three kinds of elements：" -2 ", " 0 " and " 2 ".If elementFor " 2 ", if then illustrating, frame is configured to j (the jth row in Matrix C), Subframe k is misjudged into descending；IfFor " -2 ", then illustrate that subframe k is missed Sentence into up；IfFor " 0 ", illustrate not judge by accident.
It is then possible to it is based onThe numbers of middle various elements calculatesWith of each frame configuration in Matrix C With distance.Explanation calculates two specific examples of the matching distance below.
In a specific example, it can utilizeThe matching distance is calculated with the difference of every kind of frame configuration in C.A vector is formed with the matching distance of each frame configuration in C, is usedTo represent.It is for example, availableIn it is non- " 0 " original number (number for mistake in judgment occur) calculates Matching with jth kind Configuration Type away from From(i.e.In j-th of element) may be defined as：
Wherein,RepresentJth row in non-zero element number.
In another specific example, when calculating the matching distance, element " i " can be weighted, with embody non-zero element "- 2 " the not same-action with " 2 " in matching distance calculating.It is for instance possible to use following formula：
Wherein, i=2, -2,0；wiExpression value is the weight coefficient of i element,RepresentWith jth kind The matching distance of Configuration Type,RepresentJth row in non-zero element number. Form vectorThe vector includesWith the matching distance of each frame configuration in C.The minimum element of intermediate value Position correspondence inThe minimum frame Configuration Type of matching distance.Preferably, w0=0, and w2And w-2It may be configured as different Value.For example, w can be made2=w-2, this represents that matching distance is directly proportional to the number that subframe type is different.And for example, w can be caused2 And w-2Size it is unequal, and its numerical value may be referred to subframe detection in by it is up erroneous judgement into it is descending and by it is descending know erroneous judgement into The size of up error probability is set, so as to improving the accuracy of matching.If for example, it is identified as up probability by descendingDescending probability is identified as than upIt is small, illustrateIn correct frame Configuration Type corresponding to row in, The probability that element " -2 " occurs will be smaller than the probability that element " 2 " occurs, therefore can cause w-2＞ w2, occur more " -2 " with increase Frame Configuration Type withMatching distance.Conversely, it can then cause w-2＜ w2。
After the matching distance for obtaining determining result and every kind of standard configuration, both can will with to determine the matching distance of result minimum Standard configuration be defined as main system channel resource uplink-downlink configuration type.
Alternatively, after estimation obtains determining matching distance of the result with every kind of standard configuration, can also determine whether Whether meet predetermined relation between resulting minimal matching span and predetermined threshold (being referred to as the 6th threshold value), if so, then recognizing For the uplink-downlink configuration type of channel resource that the standard configuration corresponding to the minimal matching span is main system.For example, set Six threshold value WthTo represent, when the minimal matching span is less than or equal to the threshold value, just standard configuration corresponding to determination has Effect, otherwise it is assumed that the matching result is invalid.With the matching distance vector in above-mentioned exampleExemplified by：
NtypeFor a vector, configured wherein including the every kind of standard frame obtained afterwards using M matching of M frame data progress The number that the match is successful.Work as vectorIn least memberLess than or equal to threshold value WthWhen, it is believed that institute is right The frame Configuration Type answered is credible (i.e. by NtypeIn respective element increase and one (used in above formula To represent)), otherwise, then it is assumed that matching is invalid.
In addition, it can obtain following formula：
Wherein, tnA vector is represented, wherein the n of the positional representation n-th group for the element of " 1 "coIndividual SU configures class to frame The court verdict of type.As described above, it is assumed that nid SU for participating in detection is divided into ndGroup, every group includes ncoIndividual SU (nd=nid/ nco), then it can obtain ndThe individual group of court verdict attended as a nonvoting delegate to frame configuration, i.e. ndIndividual vectorial tn(1≤n≤nd).By these judgement knots Fruit is merged again, can obtain final court verdict, such as final court verdict can be calculated using following formula：
Wherein, T represents final court verdict (the frame Configuration Type finally determined), i.e. ndIn individual frame court verdict The frame Configuration Type that the number of appearance is most is selected as final frame Configuration Type.
Below with vectorExemplified by, describe to determine main system using the determination result of multiple subsystem equipment Another specific example of the uplink-downlink configuration type of channel resource.
By the way of Soft Inform ation, can using following formula come calculate its in Matrix C per matching between a line away from From：
Wherein,For a vector, element value therein represents vectorWith each standard frame configuration matching away from From.As can be seen thatIt is more alike with the configuration of some frame, thenIn corresponding element value it is bigger.This with formula (21) and (22) in the example described byContrast.Therefore, can incite somebody to actionStandard corresponding to the maximum element of intermediate value Configuration is defined as the uplink-downlink configuration type of the channel resource of main system.
Alternatively, can also estimate matching result that above formula (26) obtains whether with predetermined threshold (being referred to as the 7th threshold value) it Between whether meet predetermined relation, if, then it is assumed that standard configuration corresponding to the matching result is the channel resource of main system Uplink-downlink configuration type.For example, following formula can be used：
In above formula, NtypeFor a vector, wherein comprising carrying out every kind of mark that M matching obtain afterwards using M frame data The quasi- successful number of frame configurations match.The 7th threshold value is represented, ifMiddle maximum element value is more than or equal to The threshold value, then it is assumed that this matching result is credible (i.e. by NtypeIn respective element increase and one (used in above formulaTo represent)), otherwise, then it is assumed that matching is invalid.
Some implementations of the equipment being used in cognitive radio communication systems according to the disclosure are described below.
Figure 10 is the schematic frame for the structure for showing the equipment being used in cognitive radio system according to one embodiment Figure.As shown in Figure 10, the equipment 1000 can include reception device 1001, feature deriving means 1002 and up-downgoing judgment means 1003.Equipment 1000 can detect the letter of main system using the method in the embodiment or example above with reference to descriptions such as Fig. 1 The uplink-downlink configuration of road resource.
Specifically, reception device 1001 can be used for receiving the signal of communication in main system between each equipment, and this is communicated Signal provides and arrives feature deriving means 1002.
Extraction can be anti-in the signal of communication that feature deriving means 1002 can be used for receiving from the reception device 1001 One or more features for the difference reflected between the downstream transmission mode of main system, and provide the feature to up-downgoing Judgment means 1003.Feature deriving means 1002 can use the side in the embodiment or example described hereinbefore with reference to Fig. 1-8 Method extracts the feature.For example, the feature extracted can include the feature of the transmission power of reflection signal of communication, reflection is led to Believe at least one in the ratio between the feature of modulation system and the peak value of the signal of communication and average of signal.
Up-downgoing judgment means 1003 can be used for judging reception device according to the feature of the extraction of feature deriving means 1002 The channel resource that 1001 signals of communication received take is used for uplink or downlink transfer.Up-downgoing judgment means 1003 The judgement can be carried out using the method in the embodiment or example described hereinbefore with reference to Fig. 1-8.
The signal of communication of received main system is utilized to judge main system above with reference to Figure 10 equipment 1000 described The uplink-downlink configuration of channel resource.It need not carry out information exchange with the equipment of main system, therefore, there is no need to main system change Its system configuration, it can preferably meet the requirement that subsystem is transparent to main system under CR scenes.
The use in cognitive radio system (also referred to as subsystem) can be configured at reference to the equipment 1000 that figure 10 describes In family equipment (SU), it can also be configured in the base station in subsystem (SBS).
As a specific embodiment, equipment 1000 can use the method shown in Fig. 2.Feature deriving means 1002 can be with It is arranged to estimate energy value of the signal of communication that receives of reception device 1001 in channel resource, can as described The feature of the difference reflected between the downstream transmission mode of main system.Up-downgoing judgment means 1003 can be arranged to judge Whether meet to make a reservation between energy value and predetermined threshold (first threshold as described above) that feature deriving means 1002 are estimated Relation, if so, then judging that the channel resource is used for downlink transfer.Specifically, up-downgoing judgment means 1003 may determine that Whether estimated energy value is more than first threshold, if so, then judging that the channel resource is used for downlink transfer, otherwise, then judges The channel resource is used for uplink.
As described above, first threshold can be set according to the maximum uplink transmission power and down transmitting power of main system Put, be not repeated herein.
In above-described specific embodiment, the equipment 1000 of subsystem utilizes main system up-downgoing transmission power Difference judges the uplink-downlink configuration of the channel resource of main system.Down transmitting power and its maximum up hair except main system Penetrate outside power, other prior informations that subsystem need not obtain main system can carry out the judgement of uplink-downlink configuration, easily In the deployment of subsystem.
Alternatively, the up-downgoing judgment means 1003 of equipment 1000 are in the energy value estimated using feature deriving means 1002 Having judged the channel resource is used for after uplink, can also determine whether the uplink channel resources are idle, Processing procedure as described by can utilize hereinbefore with reference to the dotted line frame 208 in Fig. 2, using two threshold values (first threshold and Second Threshold) judged, it is not repeated herein.
Figure 11 is the knot for showing the equipment 1100 being used in cognitive radio communication systems according to another specific embodiment The schematic block diagram of structure.It is with the similarity of equipment 1000, the equipment 1100 also includes reception device 1101, feature extraction Device 1102 and up-downgoing judgment means 1103, difference is, it also includes coalignment 1104.
Reception device 1101, feature deriving means 1102 and up-downgoing judgment means 1103 respectively with above-described reception Device 1001, feature deriving means 1002 are similar with the function of up-downgoing judgment means 1003, can use and be retouched above with reference to Fig. 4-9 The method stated judges the uplink-downlink configuration of the channel resource of the signal of communication of main system, is not repeated herein.
Coalignment 1104 can be used for the channel for the judged result and main system for obtaining up-downgoing judgment means 1103 to provide One or more standard configurations in source match, with the result according to the matching come determine the channel resource of main system up and down Row Configuration Type.Coalignment 1104 can be entered using the method in the embodiment or example described hereinbefore with reference to Fig. 4-9 The row matching.For example, coalignment 1104 can calculate judged result and each mark that up-downgoing judgment means 1103 obtain The matching distance of quasi- configuration, and the standard configuration most matched with the judged result is determined according to the matching distance, as The Configuration Type (step 410-1 and 410-2 as shown in Figure 6) of the channel resource of main system, is not repeated herein.
Similar to equipment 1000, equipment 1100 can be configured at the use in cognitive radio system (also referred to as subsystem) In family equipment (SU), it can also be configured in the base station in subsystem (SBS).
The equipment 1100 of subsystem can utilize the priori pair of the standard configuration of the channel resource about main system The judged result of the uplink-downlink configuration of the channel resource of main system is further optimized, so that result is more accurate.This A little prioris can be for example stored in the storage device (not shown) associated with equipment 1100, and the storage device can be with It is memory inside equipment 1100 or is connected and can be filled by the external storage that equipment 1100 accesses with equipment 1100 Put.
In a specific embodiment, the equipment 1000 or 1100 of subsystem can utilize carries from multistage signal of communication The feature taken judges that the channel resource is used for uplink or downlink transfer.Specifically, reception device 1001 or 1101 Can receive multistage signal of communication (such as multiframe), feature deriving means 1002 or 1102 can repeat step 104 or 204 or 404 processing, the features described above from multistage signal of communication.Up-downgoing judgment means 1003 or 1103 can repeat step 106 or 206 or 406 processing, and coalignment 1104 can repeat the processing in step 410.It can so reduce each Influence of the random error event to matching result in subframe detection process, so that the up-downgoing of resulting channel resource Configuration result is more accurate.
In examples described above or example provide a kind of cognitive radio communication systems (subsystem), wherein Including equipment 1000 or 1100, and detect using the equipment uplink-downlink configuration of main system channel resource.Equipment 1000 or 1100 can be the base station in subsystem or the user equipment in subsystem.Equipment 1000 or 1100 can incite somebody to action The other equipment that judged result is sent in subsystem using the dispensing device of the equipment 100 or 1100 in figure (as (do not shown Go out)).
For example, if equipment 1000 or 1100 is the user equipment in subsystem, the user equipment can utilize it Its judged result is sent to the base station in subsystem by dispensing device (not shown), and is distributed to subsystem by base station In other users equipment.Or the user equipment 1000 or 1100 can utilize its dispensing device (not shown) by its Judged result is sent to other users equipment.And for example, if equipment 1000 or 1100 is the base station in subsystem, the base station One or more user equipmenies that its judged result can be sent in the subsystem.
In other embodiments, cognitive radio communication systems (subsystem) can include multiple equipment 1000 or 1100, and using multiple equipment simultaneously carry out main system channel resource uplink-downlink configuration judgement.Multiple equipment can divide Its judged result can be sent to one of equipment using its dispensing device (not shown), and by the equipment pair These judged results are merged.Cooperated by using multiple subsystem equipment, the space of individual equipment can be reduced The influence to the precision of testing result is distributed, so that the uplink-downlink configuration result of resulting channel resource is more accurate.
In a specific embodiment, the reception device (such as 1101) in the equipment (such as 1100) of subsystem can also by with Put and the channel of main system is provided for receiving one or more other equipments in subsystem (being referred to as the second equipment) Determination result (such as step 812) of the uplink-downlink configuration type in source.Coalignment 1104 in equipment 1100 can be arranged to According to the one or more of the channel resource of this equipment and multiple the determination results and main system of other equipment (the second equipment) Standard configuration, to further determine that the uplink-downlink configuration type of the channel resource of main system (as with reference to the place described in step 816 Reason).Coalignment 1104 can be more to merge using the method in the embodiment or example hereinbefore with reference to Fig. 8 or Fig. 9 descriptions Individual determination result, and according to fusion results come the uplink-downlink configuration type of the final channel resource for determining main system.For example, matching Device 1104 can be additionally configured to before carrying out merging multiple determination results, estimate the confidence level of each determination result, and is gone Except the small determination result of confidence level (processing of such as step 820).Coalignment 1104 can using method as described herein above come Aforesaid operations are carried out, are not repeated herein.
In another specific embodiment, reception device in the equipment (such as 1000 or 1100) of subsystem (such as 1000 or 1101) it can also be arranged to receive one or more other equipments (the second equipment) in subsystem to described another The channel resource shared by signal of communication in one radio communications system between each equipment is up or descending judgement knot Fruit (processing of such as step 712).Up-downgoing judgment means can be also arranged to according to this equipment and institute (such as 1003 or 1103) Multiple judged results of other equipment (second) are stated to determine that it is up that the channel resource shared by the signal of communication of main system is used for Transmission or downlink transfer (as with reference to the processing described in step 714).As a specific example, up-downgoing judgment means are (such as It 1003 or 1103) can also be arranged to before carrying out merging multiple judged results, estimate the confidence level of each judged result, And remove the small judged result of confidence level (processing of such as step 716).Up-downgoing judgment means (such as 1003 or 1103) can adopt Aforesaid operations are carried out with the method in embodiments described hereinbefore or example, description is not repeated herein.
As a specific embodiment, feature deriving means (such as 1002 or 1103) can also be arranged to extraction and receive dress The synchronizing information in the signal of communication that (such as 1001 or 1101) receive is put, each channel taken to position the signal of communication provides Source.Reference can be made to above with reference to the processing described in step 203, it is not repeated herein.
In above-described embodiment and example, the statement such as " first ", " second " is employed.One of ordinary skill in the art should Understand, above-mentioned statement is intended merely to make term literal differentiation, and not represents its order or any other restriction.
It should be understood that above-described embodiment and example are exemplary, rather than exhaustive, the disclosure is not construed as limiting to In any specific embodiment or example.
As an example, it is above-mentioned be used for cognitive radio system in method each step and the said equipment it is each Individual comprising modules and/or unit may be embodied as in base station (SBS) or user equipment (SU) in the cognitive radio system Software, firmware, hardware or its combination, and as the part in the base station or user equipment.Each composition mould in the said equipment Workable specific means or mode are ability when block, unit are configured by way of software, firmware, hardware or its combination Known to field technique personnel, it will not be repeated here.As an example, basis can be implemented in existing base station or user equipment The disclosure above method and/or equipment, wherein making certain modification to each part of existing base station or user equipment.
As an example, in the case where being realized by software or firmware, can from storage medium or network to Computer (such as all-purpose computer 1200 shown in Figure 12) installation of specialized hardware structure, which is formed, to be used to implement the above method The program of software, the computer are able to carry out various functions etc. when being provided with various programs.
In fig. 12, CPU (CPU) 1201 according to the program stored in read-only storage (ROM) 1202 or from The program that storage part 1208 is loaded into random access memory (RAM) 1203 performs various processing.In RAM 1203, also root The data required when CPU 1201 performs various processing etc. are stored according to needs.CPU 1201, ROM 1202 and RAM 1203 It is connected to each other via bus 1204.Input/output interface 1205 is also connected to bus 1204.
Components described below link is to input/output interface 1205：Importation 1206 (including keyboard, mouse etc.), output Part 1207 (including display, such as cathode-ray tube (CRT), liquid crystal display (LCD) etc., and loudspeaker etc.), storage part Divide 1208 (including hard disks etc.), communications portion 1209 (including NIC such as LAN card, modem etc.).Communication unit 1209 are divided to perform communication process via network such as internet.As needed, driver 1210 also can link connect to input/output Mouth 1205.Detachable media 1211 such as disk, CD, magneto-optic disk, semiconductor memory etc. are installed in drive as needed On dynamic device 1210 so that the computer program read out is installed in storage part 1208 as needed.
It is such as removable from network such as internet or storage medium in the case where realizing above-mentioned series of processes by software Unload the program that the installation of medium 1211 forms software.
It will be understood by those of skill in the art that this storage medium is not limited to wherein be stored with journey shown in Figure 12 Sequence and equipment are separately distributed to provide a user the detachable media 1211 of program.The example bag of detachable media 1211 Containing disk (including floppy disk (registration mark)), CD (comprising compact disc read-only memory (CD-ROM) and digital universal disc (DVD)), Magneto-optic disk (including mini-disk (MD) (registration mark)) and semiconductor memory.Or storage medium can be ROM 1202, deposit Hard disk included in storage part 1208 etc., wherein computer program stored, and user is distributed to together with the equipment comprising them.
The disclosure also proposes a kind of program product for the instruction code for being stored with machine-readable.The instruction code is by machine When device reads and performed, the above-mentioned method according to the embodiment of the present disclosure can perform.
Correspondingly, the storage medium of the program product for carrying the above-mentioned instruction code for being stored with machine-readable is also wrapped Include in the disclosure of the disclosure.The storage medium includes but is not limited to floppy disk, CD, magneto-optic disk, storage card, memory stick etc. Deng.
In the description to disclosure specific embodiment above, for a kind of description of embodiment and/or the feature shown It can be used with same or similar mode in one or more other embodiments, with the feature in other embodiment It is combined, or substitute the feature in other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, key element, step or component when being used herein, but simultaneously It is not excluded for the presence or additional of one or more further features, key element, step or component.
In addition, disclosed method be not limited to specifications described in time sequencing perform, can also according to it His time sequencing, concurrently or independently perform.Therefore, the execution sequence of the method described in this specification is not to this public affairs The technical scope opened is construed as limiting.
Although being had been disclosed above by the description of the specific embodiment to the disclosure to the disclosure, should The understanding, above-mentioned all embodiments and example are illustrative, and not restrictive.Those skilled in the art can be in institute Various modifications, improvement or equivalent of the design to the disclosure in attached spirit and scope by the claims.These modification, improve or Person's equivalent should also be as being to be considered as included in the protection domain of the disclosure.
The embodiment of the present disclosure also includes：
(1) a kind of equipment being used in cognitive radio communication systems, including：
Reception device, for receiving the signal of communication in another radio communications system between each equipment；
Feature deriving means, another radio communications system can be reflected for being extracted from the signal of communication One or more features of difference between downstream transmission mode；And
Up-downgoing judgment means, for judging that the channel resource that the signal of communication takes is used for according to the feature Row transmission or downlink transfer.
(2) equipment being used in cognitive radio communication systems according to (1), wherein, one or more Feature includes at least one in following characteristics：
Reflect the feature of the transmission power of the signal of communication, reflect the feature of the modulation system of the signal of communication, with And the ratio between the peak value of the signal of communication and average.
(3) equipment being used in cognitive radio communication systems according to (1), wherein, the feature deriving means It is arranged to estimate energy value of the signal of communication in the channel resource, as the feature, and
The up-downgoing judgment means are arranged to judge whether meet between estimated energy value and predetermined threshold Predetermined relation, if so, then judging that the channel resource is used for downlink transfer.
(4) equipment being used in cognitive radio communication systems according to (3), wherein, the predetermined threshold is root Set according to the maximum uplink transmission power and down transmitting power of another radio communications system.
(5) equipment being used in cognitive radio communication systems according to (1), in addition to：
Coalignment, for by one of the result of the judgement and the channel resource of another radio communications system Or more standard configuration match, determine that the channel of another radio communications system provides with the result according to the matching The uplink-downlink configuration type in source.
(6) according to the equipment being used in cognitive radio communication systems described in (5), wherein, the coalignment by with Put for carrying out the matching according to following：
Calculate the result of the judgement and the matching distance of each standard configuration；And
The standard configuration most matched with the result of the judgement is determined according to the matching distance.
(7) equipment being used in cognitive radio communication systems according to (5), wherein：
It is one or more in the cognitive radio communication systems that the reception device is additionally configured to reception Determination result of the individual other equipment to the uplink-downlink configuration type of the channel resource of another radio communications system；And
The coalignment be arranged to according to multiple determination results of this equipment and the other equipment with it is described another One or more standard configurations of the channel resource of one radio communications system, to determine another radio communications system Channel resource uplink-downlink configuration type.
(8) according to the equipment being used in cognitive radio communication systems described in (7), wherein, the coalignment also by It is configured to：Estimation is each to determine the confidence level of result, and removes the small determination result of confidence level.
(9) equipment being used in cognitive radio communication systems according to (1) or (5), wherein：
The reception device, it is one or more in the cognitive radio communication systems to be additionally configured to reception On individual other equipment is to the channel resource shared by the signal of communication between each equipment in another radio communications system Capable or descending judged result, and
The up-downgoing judgment means are arranged to be determined according to the judged result of this equipment and the other equipment Channel resource shared by the signal of communication is used for uplink or downlink transfer.
(10) equipment being used in cognitive radio communication systems according to (9), wherein, the up-downgoing judges dress The confidence level for being additionally configured to estimate each judged result is put, and removes the small judged result of confidence level.
(11) equipment being used in cognitive radio communication systems according to (1), wherein, the feature deriving means It is additionally configured to extract the synchronizing information in the signal of communication, to position each channel resource that the signal of communication takes.
(12) equipment being used in cognitive radio communication systems according to (1), wherein, the up-downgoing judges dress Put and be arranged to utilize the feature extracted from multistage signal of communication to judge that the channel resource is used for uplink still Downlink transfer.
(13) equipment being used in cognitive radio communication systems according to (1), wherein, another radio leads to Letter system is the communication system based on time division transmission.
(14) a kind of method being used in cognitive radio communication systems, including：
Receive the signal of communication between each equipment in another radio communications system；
Extraction reflects between the downstream transmission mode of another radio communications system from the signal of communication One or more features of difference；And
Judge that the channel resource that the signal of communication takes is used for uplink or downlink transfer according to the feature.
(15) method being used in cognitive radio communication systems according to (14), wherein, it is one or more Individual feature includes at least one in following characteristics：
Reflect the feature of the transmission power of the signal of communication, reflect the feature of the modulation system of the signal of communication, with And the ratio between the peak value of the signal of communication and average.
(16) method being used in cognitive radio communication systems according to (14), wherein, from the signal of communication Middle extraction reflects that the feature includes：Estimate energy value of the signal of communication in the channel resource, as the feature, And
Judge that the channel resource that the signal of communication takes includes for uplink or downlink transfer：Estimated by judgement Energy value and predetermined threshold between whether meet predetermined relation, if so, then judging that the channel resource is used for downlink transfer.
(17) method being used in cognitive radio communication systems according to (14), in addition to：
By the result of the judgement and one or more standards of the channel resource of another radio communications system Configuration matches, to determine the uplink-downlink configuration type of the channel resource of another radio communications system.
(18) method being used in cognitive radio communication systems according to (17), wherein, by the knot of the judgement One or more standard configurations of the channel resource of fruit and another radio communications system match including：
Calculate the result of the judgement and the matching distance of each standard configuration；And
The standard configuration most matched with the result of the judgement is determined according to the matching distance.
(19) method being used in cognitive radio communication systems according to (17), in addition to：
One or more other equipments in the cognitive radio communication systems are received to described another wireless The determination result of the uplink-downlink configuration type of the channel resource of electrical communication system, and
Wherein, by the one or more of the result of the judgement and the channel resource of another radio communications system Standard configuration match including：According to multiple determination results of this equipment and the other equipment and another radio communication One or more standard configurations of the channel resource of system, to determine the channel resource of another radio communications system Uplink-downlink configuration type.
(20) method being used in cognitive radio communication systems according to (14) or (17), in addition to：
One or more other equipments in the cognitive radio communication systems are received to described another wireless The channel resource shared by signal of communication in electrical communication system between each equipment is up or descending judged result, and
Wherein, judge that the channel resource that the signal of communication takes includes for uplink or downlink transfer：According to The judged result of this equipment and the other equipment determines that the channel resource shared by the signal of communication is used for uplink Or downlink transfer.
(21) method being used in cognitive radio communication systems according to (14), wherein, another radio Communication system is the communication system based on time division transmission.

Claims (49)

1. a kind of equipment being used in the first radio communications system, including：
Memory and processor, wherein, the memory storage computer instruction, the processor is configured as execution and is stored in The computer instruction in the memory is to perform
Receive the signal of communication between each equipment in the second radio communications system；
Extraction can reflect that the first transmission means of second radio communications system and second passes from the signal of communication One or more features of difference between defeated mode；And
Judge that the channel resource that the signal of communication takes is used for the first transmission means or the second transmission according to the feature Mode,
Wherein, the equipment in first radio communications system accesses the frequency for not possessing mandate based on judged result opportunistic Spectrum, the channel resource that the signal of communication takes are located at the frequency spectrum that the equipment does not possess mandate.
2. the equipment according to claim 1 being used in the first radio communications system, wherein, one or more Feature includes at least one in following characteristics：
Reflect the feature of the transmission power of the signal of communication, reflect the feature of the modulation system of the signal of communication, Yi Jisuo State the ratio between peak value and average of signal of communication.
3. the equipment according to claim 1 being used in the first radio communications system, wherein, the processor estimates institute Energy value of the signal of communication in the channel resource is stated, as the feature, and
Judge whether meet predetermined relation between estimated energy value and predetermined threshold, the letter is determined based on judged result Road resource is used for the first transmission means or the second transmission means.
4. the equipment according to claim 3 being used in the first radio communications system, wherein, the predetermined threshold is root Set according to maximum the first transmission means transmission power and the second transmission means transmission power of second radio communications system Put.
5. the equipment according to claim 1 being used in the first radio communications system, wherein, the processor is also by institute The result and one or more standard configurations of the channel resource of second radio communications system for stating judgement match, with The first, second transmission means alternating of the channel resource of second radio communications system is determined according to the result of the matching Configuration Type.
6. the equipment according to claim 5 being used in the first radio communications system, wherein, the processor according to Get off to carry out the matching：
Calculate the result of the judgement and the matching distance of each standard configuration；And
The standard configuration most matched with the result of the judgement is determined according to the matching distance.
7. the equipment according to claim 5 being used in the first radio communications system, wherein：
The processor be additionally configured to receive in first radio communications system it is one or more other Equipment is alternately arranged the determination knot of type to first, second transmission means of the channel resource of second radio communications system Fruit；And
According to multiple determination results of this equipment and the other equipment and the channel resource of second radio communications system One or more standard configurations, come determine the first, second of the channel resource of second radio communications system transmission Mode is alternately arranged type.
8. the equipment according to claim 7 being used in the first radio communications system, wherein, the processor also by with Put and be used for：Estimation is each to determine the confidence level of result, and removes the small determination result of confidence level.
9. the equipment being used for according to claim 1 or 5 in the first radio communications system, wherein：
The processor, be additionally configured to receive in first radio communications system it is one or more other Equipment is the first transmission to the channel resource shared by the signal of communication between each equipment in second radio communications system The judged result of mode or the second transmission means, and
Determine that the channel resource shared by the signal of communication is used for according to the judged result of this equipment and the other equipment First transmission means or the second transmission means.
10. the equipment according to claim 9 being used in the first radio communications system, wherein, the processor also by It is configured to estimate the confidence level of each judged result, and removes the small judged result of confidence level.
11. the equipment according to claim 1 being used in the first radio communications system, wherein, the processor also by It is configured to extract the synchronizing information in the signal of communication, to position each channel resource that the signal of communication takes.
12. the equipment according to claim 1 being used in the first radio communications system, wherein, the processor by with Put for utilizing the feature extracted from multistage signal of communication to judge that the channel resource is used for the first transmission means or the Two transmission means.
13. the equipment according to claim 1 being used in the first radio communications system, wherein, the first transmission side Formula corresponds to uplink, and the second transmission means corresponds to downlink transfer.
14. the equipment according to claim 1 being used in the first radio communications system, wherein, second radio Communication system is the communication system based on time division transmission.
15. a kind of method being used in the first radio communications system, including：
Receive the signal of communication between each equipment in the second radio communications system；
Extraction can reflect that the first transmission means of second radio communications system and second passes from the signal of communication One or more features of difference between defeated mode；And
Judge that the channel resource that the signal of communication takes is used for the first transmission means or the second transmission according to the feature Mode,
Wherein, the equipment in first radio communications system accesses the frequency for not possessing mandate based on judged result opportunistic Spectrum, the channel resource that the signal of communication takes are located at the frequency spectrum that the equipment does not possess mandate.
16. the method according to claim 15 being used in the first radio communications system, wherein, it is one or more Individual feature includes at least one in following characteristics：
Reflect the feature of the transmission power of the signal of communication, reflect the feature of the modulation system of the signal of communication, Yi Jisuo State the ratio between peak value and average of signal of communication.
17. the method according to claim 15 being used in the first radio communications system, in addition to the estimation communication Energy value of the signal in the channel resource as the feature, and
Judge whether meet predetermined relation between estimated energy value and predetermined threshold, the letter is determined based on judged result Road resource is used for the first transmission means or the second transmission means.
18. the method according to claim 17 being used in the first radio communications system, wherein, the predetermined threshold is According to maximum the first transmission means transmission power of second radio communications system and the second transmission means transmission power come Set.
19. the method according to claim 15 being used in the first radio communications system, in addition to by the judgement As a result one or more standard configurations with the channel resource of second radio communications system match, with according to this The result matched somebody with somebody determines that first, second transmission means of the channel resource of second radio communications system is alternately arranged class Type.
20. the method according to claim 19 being used in the first radio communications system, wherein, carried out according to following The matching：
Calculate the result of the judgement and the matching distance of each standard configuration；And
The standard configuration most matched with the result of the judgement is determined according to the matching distance.
21. the method being used in the first radio communications system according to claim 15 or 19, wherein：
Also include receiving one or more other equipments in first radio communications system to second nothing The channel resource shared by signal of communication in line electrical communication system between each equipment is the first transmission means or the second transmission The judged result of mode, and
Shared by the signal of communication being determined according to this equipment of methods described and the judged result of the other equipment is performed Channel resource be used for the first transmission means or the second transmission means.
22. the method according to claim 15 being used in the first radio communications system, wherein, the processor also by It is configured to extract the synchronizing information in the signal of communication, to position each channel resource that the signal of communication takes.
23. the method according to claim 15 being used in the first radio communications system, wherein, the processor by with Put for utilizing the feature extracted from multistage signal of communication to judge that the channel resource is used for the first transmission means or the Two transmission means.
24. the method according to claim 15 being used in the first radio communications system, wherein, the first transmission side Formula corresponds to uplink, and the second transmission means corresponds to downlink transfer.
25. a kind of computer-readable storage medium, record has computer-readable computer program code, the computer journey thereon Sequence code is when being read by computer and being performed so that the computer is performed as any one of claim 15-24 For the method in the first radio communications system.
26. a kind of equipment being used in radio communications system, including：
Memory and processor, wherein, the memory storage computer instruction, the processor is configured as execution and is stored in The computer instruction in the memory is to perform
The signal energy value on multiple channel resources is estimated according to energy measuring method；
The seizure condition of each channel resource is determined based on the relation between estimated energy value and predetermined threshold；
The occupancy pattern of the plurality of channel resource is estimated according to the seizure condition of the multiple channel resource；And
Frequency spectrum corresponding to the multiple channel resource is accessed based on estimated occupancy pattern opportunistic,
Wherein, the frequency spectrum can be simultaneously shared by other equipment, and the equipment is avoiding that the other equipment is caused to do The frequency spectrum is accessed on the basis of disturbing.
27. equipment as claimed in claim 26, wherein, the seizure condition include idle, the first transmission means take and At least one of second transmission means occupancy.
28. equipment as claimed in claim 26, wherein,
The processor is additionally configured to account for estimated occupancy pattern with the one or more of the multiple channel resource Matched with pattern configurations, base is controlled using the result of the matching as using the interference corresponding to the plurality of channel resource during frequency spectrum Plinth.
29. equipment as claimed in claim 28, wherein, the memory is previously stored with one or more and takes mould Formula configures.
30. equipment as claimed in claim 26, wherein,
The occupancy pattern reflects the alternate mode of the different seizure conditions of the plurality of channel resource.
31. equipment as claimed in claim 26, wherein, the processor is additionally configured to carry out in Fu the signal received Leaf transformation obtains the sample of signal of energy measuring to estimate the signal energy value.
32. equipment as claimed in claim 26, wherein, the predetermined threshold is the signal transmitting work(based on specific transmission mode Rate and environmental background noise setting.
33. equipment as claimed in claim 26, wherein, access of the equipment to the frequency spectrum is for the other equipment It is transparent.
34. equipment as claimed in claim 27, wherein, first transmission means corresponds to uplink transmission mode, and described Two transmission means correspond to downlink transmission mode.
35. equipment as claimed in claim 34, wherein, the occupancy pattern corresponds to uplink-downlink configuration type.
36. equipment as claimed in claim 26, wherein, the frequency spectrum is the frequency spectrum that the equipment does not possess mandate.
37. a kind of method being used in radio communications system, including：
The signal energy value on multiple channel resources is estimated according to energy measuring method；
The seizure condition of each channel resource is determined based on the relation between estimated energy value and predetermined threshold；
The occupancy pattern of the plurality of channel resource is estimated according to the seizure condition of the multiple channel resource；And
Frequency spectrum corresponding to the multiple channel resource is accessed based on estimated occupancy pattern opportunistic,
Wherein, the frequency spectrum can be simultaneously shared by other equipment, and the equipment is avoiding that the other equipment is caused to do The frequency spectrum is accessed on the basis of disturbing.
38. a kind of equipment being used in radio communications system, including：
Memory and processor, wherein, the memory storage computer instruction, the processor is configured as execution and is stored in The computer instruction in the memory is to perform
Detect the energy value on channel resource；
Based on the energy value and the relation of predetermined threshold detected with the seizure condition of certain probabilistic determination channel resource；With And
It will determine that result is sent to a fusion device to merge the multiple equipment in different spaces distribution with the energy value detected Judged result,
Wherein, the equipment accesses the frequency spectrum for not possessing mandate based on judged result opportunistic, and the channel resource is located at institute State the frequency spectrum that equipment does not possess mandate.
39. equipment as claimed in claim 38, wherein, the processor is configured as to multiple samples on the channel resource This progress energy measuring simultaneously calculates average value to be used as the energy value detected.
40. equipment as claimed in claim 39, wherein, each sample corresponds to a symbol, and the processor is configured as The energy of multiple continuous symbols is detected and calculates average value to be used as the energy value detected.
41. equipment as claimed in claim 40, wherein, the processor is configured as to being received on the channel resource Signal carries out Fourier transformation to obtain the symbol.
42. equipment as claimed in claim 38, wherein, the predetermined threshold be based on take the signal transmission power of equipment with Environmental background noise setting, the seizure condition includes at least one of idle, occupancy.
43. equipment as claimed in claim 38, wherein, the equipment is embodied as user equipment, and the fusion device is embodied as Base station equipment.
44. a kind of method being used in radio communications system, including：
Detect the energy value on channel resource；
Based on the energy value and the relation of predetermined threshold detected with the seizure condition of certain probabilistic determination channel resource；With And
It will determine that result is sent to a fusion device to merge the multiple equipment in different spaces distribution with the energy value detected Judged result,
Wherein, the equipment accesses the frequency spectrum for not possessing mandate based on judged result opportunistic, and the channel resource is located at institute State the frequency spectrum that equipment does not possess mandate.
45. method as claimed in claim 44, wherein, multiple samples on the channel resource are carried out with energy measuring and is counted Average value is calculated to be used as the energy value detected.
46. method as claimed in claim 45, wherein, each sample corresponds to a symbol, and the processor is configured as The energy of multiple continuous symbols is detected and calculates average value to be used as the energy value detected.
47. method as claimed in claim 46, wherein, Fourier transformation is carried out to the signal received on the channel resource To obtain the symbol.
48. method as claimed in claim 44, wherein, the predetermined threshold be based on take the signal transmission power of equipment with Environmental background noise setting, the seizure condition includes at least one of idle, occupancy.
49. a kind of computer-readable storage medium, record has computer-readable computer program code, the computer journey thereon Sequence code is when being read by computer and being performed so that the computer is performed as any one of claim 37,44-48 Be used for radio communications system in method.
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